Question # 1

Large sample contains more than

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5 values

10 values

20 values

30 values

The precision can be increased by ---------------- the sample size

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increasing

decreasing

changing

ignoring

A range of values within which the population parameter is expected:

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Confidence interval

Confidence coefficient

Confidence limits

Level of significance

The probability associated with confidence interval is called:

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Level of confidence

Confidence coefficient

Both A and B

Confidence limits

By increasing the sample size, the precision of confidence interval is:

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Decreased

Increased

Constant

Unchanged

Estimate is the observed value of an:

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Unbiased estimator

Estimation

Estimator

Interval estimation

Statistical inference has two branches namely:

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Level of confidence and degrees of freedom

Biased estimator and unbiased estimator

Point estimate and interval estimate

Estimation of parameter and testing of hypothesis

If mean of the sampling distribution is equal to the parameter then the estimator will be

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biased

consistent

sufficient

unbiased

The process of making estimates about the population parameter from a sample is called:

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Statistical independence

Statistical inference

Statistical hypothesis

Statistical decision

The difference of upper and lower limits of confidence interval measures the

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level of significance

level of confidence

interval

precision

100(1-α)% confidence interval for population proportion of success,&=nbsp;π is

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P (L <μ < U) = 1 - α

P (L <σ < U) = 1 - α

P (L <π< U) = 1 - α

P (L <P&=nbsp;< U) = 1 - α

If (1-α) is increased, the with of a confidence interval is:

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Decreased

Increased

Constant

Same

(1-α) is called:

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Critical value

Level of significance

Level of confidence

Interval estimate

If population proportion (P) is unknown, the standard error of the sample proportion (p) can be estimated by the formula

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The endpoints of a confidence interval are called:

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confidence coefficient

Confidence limits

Error of estimation

Parameters

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biased

unbiased

positively biased

none of these

Level of significance is denoted by

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2 - α

3 - α

α

1 - α

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